1. (noun)quartz glass, quartz, vitreous silica, lechatelierite, crystal colorless glass made of almost pure silica Synonyms: quartz, watch crystal, crystallization, lechatelierite, vitreous silica, crystal, quartz glass, watch glass
2. (noun)quartz a hard glossy mineral consisting of silicon dioxide in crystal form; present in most rocks (especially sandstone and granite); yellow sand is quartz with iron oxide impurities Synonyms: crystal, quartz glass, lechatelierite, vitreous silica